Rockwell Automation 6000 PowerFlex Medium Voltage Variable Frequency Drive Installation Instructions - Manual (Page 41)

Rockwell Automation Publication 6000-IN006A-EN-P - April 2014 41
Chapter
3
Drive Electrical Installation
Introduction The installation of all external power cables and control signal wiring is covered
in this chapter. General electrical safety and installation guideline topics are also
included. The basic activities include connecting the system ground cable, line
and motor cables, control power, and all control signal wiring from the sources to
the drive. See
Figure 50 and Figure 51 for an overview of these connections.
Electrical interconnections are also required between cabinets that have shipped
separately. These are described in
Chapter 4 .
Safety and Codes
Lockout and tagout the input circuit breaker before performing any electrical
connection work. After the input circuit breaker cabinet doors are opened,
immediately test the outgoing connections and any components connected to
medium voltage with a live-line tool (hot stick) while wearing high voltage
gloves. Pay special attention to any capacitors connected to medium voltage that
can retain a charge for a period of time. Only after the equipment has been
verified as isolated and de-energized can subsequent work be performed. Even
though the input to the drive may be open, it is still possible for hazardous voltage
to be present.
Refer to national and local safety guidelines for detailed procedures on how to
safely isolate the equipment from hazards.
SHOCK HAZARD: Connecting to potentially energized industrial control
equipment can be dangerous. Severe injury or death can result from electrical
shock, burn, or unintended actuation of control equipment. Hazardous voltages
may exist in the cabinet even with the circuit breaker in the off position.
Required practice is to disconnect and lock out control equipment from power
sources, and confirm discharge of stored energy in capacitors. If it is necessary
to work in the vicinity of energized equipment, the safety related work
practices outlined in Electrical Safety requirements for Employee Work places
must be followed. Before attempting any work, verify the system has been
locked out and tested to have no potential.
ATTENTION: The national and local electrical codes outline provisions for safely
installing electrical equipment. Installation must comply with specifications
regarding wire type, conductor sizes, branch circuit protection and disconnect
devices. Failure to do so may result in personal injury and/or equipment
damage.